Does anybody know if there is any difference between Schmetz and Klasse needles? And which one is better to use for quilting?

I only use Schmetz, I never heard of the other one

Me too - never heard of Klasse.

Joann's carries them in the sewing machine area.

I have used both Schmetz and Klasse' needles. I don't notice a big difference in them until I start to FMQ . I use a 90/14 Embroidery to quilt with and find the Klasse' to be a stronger needle than the Schmetz.. I break fewer and they last longer, at least that is my experience with them. I buy mine from Nancy's Notion when she has the big sales.

Jacke

Create for Less has some good buys on them also.